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DEFINED BENEFIT RETIREMENT PLAN (Details2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 25, 2010	May 12, 2010
Defined benefit retirement plan
Fair value pension plans	$ 424,495	$ 359,636	$ 351,056
Level 2 member
Defined benefit retirement plan
Fair value pension plans	424,495	359,636
Temporary cash investments
Defined benefit retirement plan
Fair value pension plans	1,556	1,397
Temporary cash investments | Level 2 member
Defined benefit retirement plan
Fair value pension plans	1,556	1,397
Index linked gilts
Defined benefit retirement plan
Fair value pension plans	97,422	50,803
Index linked gilts | Level 2 member
Defined benefit retirement plan
Fair value pension plans	97,422	50,803
Corporate bonds
Defined benefit retirement plan
Fair value pension plans	309,206	290,303
Corporate bonds | Level 2 member
Defined benefit retirement plan
Fair value pension plans	309,206	290,303
Corporate stock
Defined benefit retirement plan
Fair value pension plans	16,276	16,986
Corporate stock | Level 2 member
Defined benefit retirement plan
Fair value pension plans	16,276	16,986
Other investments
Defined benefit retirement plan
Fair value pension plans	35	147
Other investments | Level 2 member
Defined benefit retirement plan
Fair value pension plans	$ 35	$ 147

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- Definition

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Section 35

-Paragraph 50

-URI http://asc.fasb.org/extlink&oid=6867990&loc=d3e12355-114930



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph d(iv)(b)(i)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 87

-Paragraph 49

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

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